CN105586452A - Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln - Google Patents
Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln Download PDFInfo
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- CN105586452A CN105586452A CN201610113537.8A CN201610113537A CN105586452A CN 105586452 A CN105586452 A CN 105586452A CN 201610113537 A CN201610113537 A CN 201610113537A CN 105586452 A CN105586452 A CN 105586452A
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- gas
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- shaft kiln
- based shaft
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- 239000007789 gas Substances 0.000 title claims abstract description 496
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 239000001301 oxygen Substances 0.000 title claims abstract description 177
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 177
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 71
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000002309 gasification Methods 0.000 claims abstract description 62
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 54
- 239000000428 dust Substances 0.000 claims abstract description 41
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 96
- 230000009467 reduction Effects 0.000 claims description 63
- 229910052742 iron Inorganic materials 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 47
- 230000008569 process Effects 0.000 claims description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 31
- 239000001257 hydrogen Substances 0.000 claims description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 230000008676 import Effects 0.000 claims description 22
- 239000002893 slag Substances 0.000 claims description 14
- 238000011282 treatment Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 241001062472 Stokellia anisodon Species 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000003245 coal Substances 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 239000002817 coal dust Substances 0.000 description 14
- 239000003034 coal gas Substances 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 10
- 230000007812 deficiency Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000005453 pelletization Methods 0.000 description 7
- 239000000571 coke Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002407 reforming Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005255 carburizing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
- C21B13/023—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a joint production system and a joint production method of an oxygen blast furnace and a gas-based shaft kiln, wherein the joint production system of the oxygen blast furnace and the gas-based shaft kiln comprises the oxygen blast furnace, the gas-based shaft kiln, a dust removal device, a water-gas shift device, a carbon dioxide removal device, a pressurizer, and a gasification furnace; the dust removal device is connected to a blast furnace furnace-top gas outlet of the oxygen blast furnace; the water-gas shift device is connected to the dust removal device; the gas inlet of the carbon dioxide removal device is separately connected to the dust removal device, the water-gas shift device and the shaft kiln kiln-top gas outlet of the gas-based shaft kiln; the pressurizer is connected to the carbon dioxide removal device; and the gas inlet of the gasification furnace is connected to the pressurizer. The system can be used for effectively solving the problem that the oxygen blast furnace furnace-top gas circulation amount is insufficient, and also provides a sufficient gas source for the gas-based shaft kiln.
Description
Technical field
The invention belongs to field of metallurgy, particularly, the present invention relates to oxygen blast furnace with gas-based shaft kiln Joint Production system and combineProduction method.
Background technology
China's steel and iron industry consumes ample resources, discharges large quantity of exhaust gas, wherein with agglomerates of sintered pellets, coking, blast furnace and heat simultaneouslySystem for blast furnace ironmaking energy consumption and CO that wind furnace forms2Discharge the ratio of shared steel industry respectively up to 69% and 73%. WhenBefore, traditional blast furnace technology has performed to ultimate attainment at aspects such as production efficiency, energy utilizations, only rely on changing of operational meansEnter to be difficult to realize blast furnace ironmaking energy-saving and emission-reduction by a relatively large margin. For the present situation that global environmental consciousness strengthens, resource is day by day exhausted,Must be improved existing blast furnace iron-making process, be made it technically, economically and on environment, more meet era developmentNeeds. Oxygen blast furnace iron-making technology is one of ironmaking new technology most possibly realizing scale application, and it has high coal powder injectionAmount, low coke ratio, productivity ratio are high, gas quality advantages of higher, and likely making coal dust replace coke becomes the main ironmaking energyMaterial, thus significantly reduce costs. What is more important, can significantly reduce CO2Discharge, alleviates iron and steel capable greatlyThe reduction of discharging pressure that industry faces.
Gas-based shaft kiln directly reduced with reducibility gas (CO and H2) be the energy and reducing agent, lower than natural crystal or peopleMake under agglomerate softening temperature condition and reduce furnace charge to obtain solid metallic iron, the alternative steel scrap of product is also better than steel scrap, is to smeltThe best iron material of clean steel, high-grade steel. Gas-based shaft kiln directly reducedly have that production scale is large, cost is low, flexible operation,Advantages of environment protection, is used widely in the countries and regions such as the Middle East, India. Because coal resources in China reserves are abundantAnd natural gas resource lacks, the application of this iron-smelting process is restricted, form single taking coal as main energy sourcesThe long process mode of Ferrous Metallurgy, caused whole industry high energy consumption, high pollution, expensive unfavorable situation.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique. For this reason, one of the present inventionObject is to propose oxygen blast furnace and gas-based shaft kiln Joint Production system and combine production method, and this system and method is by arrangingWith use gasification furnace, can effectively solve the problem of oxygen blast furnace top gas internal circulating load deficiency, simultaneously for gas-based shaft kiln provides sufficientSource of the gas.
According to an aspect of the present invention, the present invention proposes a kind of oxygen blast furnace and gas-based shaft kiln Joint Production system. According toThe oxygen blast furnace of embodiments of the invention and gas-based shaft kiln Joint Production system, comprising:
Oxygen blast furnace, described oxygen blast furnace, for ironmaking, to obtain molten iron, and produces slag and State of Blast Furnace top gas;
Gas-based shaft kiln, described gas-based shaft kiln, for ironmaking, to obtain molten iron, and produces slag and vertical furnace top gas;
Dust arrester, described dust arrester is connected with the State of Blast Furnace top gas outlet of described oxygen blast furnace, and is suitable for described blast furnaceTop gas carries out dust removal process, and the State of Blast Furnace top gas after described dust removal process is divided into two parts;
Water gas shift/WGS device, described Water gas shift/WGS device is connected with described dust arrester, and is suitable for Part I blast furnaceTop gas is reformed, to improve hydrogen content, obtains being rich in the reducing gases of hydrogen;
Carbon dioxide de removal apparatus, the air inlet of described carbon dioxide de removal apparatus becomes with described dust arrester, water-gas respectivelyThe vertical furnace top gas outlet of changing device and described gas-based shaft kiln is connected, and is suitable for removing Part II State of Blast Furnace top gas, is rich in hydrogenThe carbon dioxide of the 0-100% volume in the mist of the reducing gases of gas and vertical furnace top gas, obtains pretreatment reducing gases;
Pressurizer, described pressurizer is connected with described carbon dioxide de removal apparatus, and is suitable for described pretreatment reducing gases to carry outPressurized treatments; And
Gasification furnace, the air inlet of described gasification furnace is connected with described pressurizer, and the gas outlet of described gasification furnace and described oxygen are highThe lower air inlet of stove and the reducing gases import of described gas-based shaft kiln are connected, and described gasification furnace is suitable for after described pressurized treatmentsPretreatment reducing gases reform and heat, to improve carbon monoxide content, obtain high temperature reduction gas, and by described heightTemperature reducing gases passes into the reducing gases import of lower air inlet and the described gas-based shaft kiln of described oxygen blast furnace.
Oxygen blast furnace according to a particular embodiment of the invention and gas-based shaft kiln Joint Production system are by gas-based shaft kiln and oxygen blast furnaceJoint Production, produces short flow process by iron and steel and combines with long flow process, has eliminated the long flow process high energy consumption of part, high CO2DischargeDrawback, the DRI simultaneously producing is the irreplaceable high-quality iron material of production high-quality steel. In addition, more can be effectivelySolve the problem of oxygen blast furnace top gas internal circulating load deficiency, simultaneously for gas-based shaft kiln provides sufficient source of the gas.
In addition, oxygen blast furnace according to the above embodiment of the present invention and gas-based shaft kiln Joint Production system can also have attached as followsThe technical characterictic adding:
In some embodiments of the invention, described oxygen blast furnace has enterprising air port, and described enterprising air port is positioned at described oxygenOn the sidewall of blast furnace and higher than the furnace bosh of described oxygen blast furnace, the gas outlet of described gasification furnace is connected with described enterprising air port, withFacility is carried out preheating and reduction with described high temperature reduction gas to the top furnace charge in described oxygen blast furnace.
In some embodiments of the invention, described carbon dioxide de removal apparatus and the cold gas that is positioned at described gas-based shaft kiln bottomImport is connected, and is suitable for described pretreatment reducing gases to pass into from the bottom of described gas-based shaft kiln.
According to a further aspect in the invention, the invention allows for a kind of oxygen blast furnace and gas-based shaft kiln combine production method. RootAccording to oxygen blast furnace and the gas-based shaft kiln combine production method of embodiments of the invention, comprising:
Utilize oxygen blast furnace to smelt iron, to obtain molten iron, and produce stock gas and slag;
Utilize gas-based shaft kiln to smelt iron, to obtain molten iron, and produce slag and vertical furnace top gas;
Described State of Blast Furnace top gas is carried out to dust removal process, and the State of Blast Furnace top gas after described dust removal process is divided into two parts;
Utilize Water gas shift/WGS device to reform to Part I State of Blast Furnace top gas, to improve hydrogen content, be rich inThe reducing gases of hydrogen;
By Part II State of Blast Furnace top gas, described in be rich in hydrogen reducing gases and described vertical furnace top gas mix, mixedClose gas, and remove the carbon dioxide of the 0-100% volume in described mist, obtain pretreatment reducing gases;
Described pretreatment reducing gases is carried out to pressurized treatments; And
Utilize gasification furnace that the pretreatment reducing gases after described pressurized treatments is reformed and heated, to improve an oxidationCarbon content, obtains high temperature reduction gas, and described high temperature reduction gas is passed into lower air inlet and the described gas base of described oxygen blast furnaceThe reducing gases import of shaft furnace.
Oxygen blast furnace according to a particular embodiment of the invention and gas-based shaft kiln combine production method are by gas-based shaft kiln and oxygen blast furnaceJoint Production, produces short flow process by iron and steel and combines with long flow process, has eliminated the long flow process high energy consumption of part, high CO2DischargeDrawback, the DRI simultaneously producing is the irreplaceable high-quality iron material of production high-quality steel. In addition, more can be effectivelySolve the problem of oxygen blast furnace top gas internal circulating load deficiency, simultaneously for gas-based shaft kiln provides sufficient source of the gas.
In addition, oxygen blast furnace according to the above embodiment of the present invention and gas-based shaft kiln combine production method can also have attached as followsThe technical characterictic adding:
In some embodiments of the invention, described oxygen blast furnace has enterprising air port, and described enterprising air port is positioned at described oxygenOn the sidewall of blast furnace and higher than the furnace bosh of described oxygen blast furnace, described oxygen blast furnace and gas-based shaft kiln combine production method are furtherComprise:
A part for described high temperature reduction gas is passed into described enterprising air port, to utilize described high temperature reduction gas to described oxygenTop furnace charge in blast furnace carries out preheating and reduction.
In some embodiments of the invention, the oxygen blast furnace of above-described embodiment and gas-based shaft kiln combine production method further wrapDraw together: described pretreatment reducing gases is passed into from the cold gas import that is positioned at described gas-based shaft kiln bottom.
Brief description of the drawings
Fig. 1 is the structural representation of oxygen blast furnace and gas-based shaft kiln Joint Production system according to an embodiment of the invention.
Fig. 2 is the structural representation of oxygen blast furnace and gas-based shaft kiln Joint Production system in accordance with another embodiment of the present invention.
Fig. 3 is the flow chart of oxygen blast furnace and gas-based shaft kiln combine production method according to an embodiment of the invention.
Fig. 4 is the flow chart of oxygen blast furnace and gas-based shaft kiln combine production method in accordance with another embodiment of the present invention.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, wherein identical from start to finishOr similarly label represents same or similar element or has the element of identical or similar functions. Below by retouching with reference to accompanying drawingThe embodiment stating is exemplary, is intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
According to another face of the present invention, the invention allows for a kind of oxygen blast furnace and gas-based shaft kiln Joint Production system.
As depicted in figs. 1 and 2, oxygen blast furnace and gas-based shaft kiln Joint Production system comprise: oxygen blast furnace 10, gas-based shaft kiln20, dust arrester 30, Water gas shift/WGS device 40, carbon dioxide de removal apparatus 50, pressurizer 60, gasification furnace 70.
Wherein, oxygen blast furnace 10, for ironmaking, to obtain molten iron, and produces slag and State of Blast Furnace top gas; Gas-based shaft kiln 20For ironmaking, to obtain molten iron, and produce slag and vertical furnace top gas; The blast furnace of dust arrester 30 and oxygen blast furnace 10Top gas outlet is connected, and is suitable for State of Blast Furnace top gas to carry out dust removal process, and by the State of Blast Furnace top gas after dust removal processBe divided into two parts; Water gas shift/WGS device 40 is connected with dust arrester 30, and is suitable for Part I State of Blast Furnace top gas to carry outReform, to improve hydrogen content, obtain being rich in the reducing gases of hydrogen; The air inlet of carbon dioxide de removal apparatus 50 respectively withThe vertical furnace top gas outlet of dust arrester 30, Water gas shift/WGS device 40 and gas-based shaft kiln 20 is connected, and is suitable for removing secondThe titanium dioxide of 0-100 volume % in the mist of part State of Blast Furnace top gas, the reducing gases that is rich in hydrogen and vertical furnace top gasCarbon, obtains pretreatment reducing gases; Pressurizer 60 is connected with carbon dioxide de removal apparatus 50, and is suitable for pretreatment reducing gasesCarry out pressurized treatments; And the air inlet of gasification furnace 70 is connected with pressurizer 60, the gas outlet of gasification furnace 70 and oxygen blast furnace10 lower air inlet is connected with the reducing gases import of gas-based shaft kiln 20, and gasification furnace 70 is suitable for the pre-place after pressurized treatmentsReason reducing gases is reformed and heats, to improve carbon monoxide content, obtains high temperature reduction gas, and high temperature reduction gas is logicalEnter the reducing gases import 22 of lower air inlet 12 and the gas-based shaft kiln 20 of oxygen blast furnace 10.
By adopting oxygen blast furnace and gas-based shaft kiln Joint Production system, particularly, by the height producing after ironmaking in oxygen blast furnaceStove top gas carries out being divided into two parts after dust removal process in dust arrester again, and Part I State of Blast Furnace top gas fills in Water gas shift/WGSIn putting, reform, to improve hydrogen content, obtain being rich in the reducing gases of hydrogen; Part II State of Blast Furnace top gas and water coalThe reducing gases that is rich in hydrogen and the vertical furnace top gas obtaining of reforming in gas converting means mixed, and at carbon dioxideRemove the carbon dioxide that removes 0-100 volume % in device, obtain pretreatment reducing gases; Pretreatment reducing gases through pressurization after at gasChange stove and reform and heat, to improve carbon monoxide content, obtain high temperature reduction gas, and pass into respectively oxygen blast furnaceThe reducing gases import of lower air inlet and gas-based shaft kiln.
Oxygen blast furnace according to a particular embodiment of the invention and gas-based shaft kiln Joint Production system are by gas-based shaft kiln and oxygen blast furnaceJoint Production, produces short flow process by iron and steel and combines with long flow process, has eliminated the long flow process high energy consumption of part, high CO2DischargeDrawback, the DRI simultaneously producing is the irreplaceable high-quality iron material of production high-quality steel. In addition, more can be effectivelySolve the problem of oxygen blast furnace top gas internal circulating load deficiency, simultaneously for gas-based shaft kiln provides sufficient source of the gas.
Ginseng is described oxygen blast furnace and the gas-based shaft kiln Joint Production system of the specific embodiment of the invention in detail below.
According to a particular embodiment of the invention, oxygen blast furnace, for ironmaking, to obtain molten iron, and produces slag and State of Blast FurnaceTop gas; Gas-based shaft kiln, for ironmaking, to obtain sponge iron, and produces vertical furnace top gas.
According to a particular embodiment of the invention, dust arrester is connected with the State of Blast Furnace top gas outlet of oxygen blast furnace further, rightState of Blast Furnace top gas is carried out dust removal process, and the State of Blast Furnace top gas after dust removal process is divided into two parts.
Respectively two part State of Blast Furnace top gas are processed below, particularly:
(1) Water gas shift/WGS device is connected with dust arrester, Water gas shift/WGS device and being suitable for Part I State of Blast Furnace top gasReform, to improve hydrogen content, obtain being rich in the reducing gases of hydrogen.
Thus, Part I State of Blast Furnace top gas first-selection is reformed in Water gas shift/WGS device, to regulate Part I highHydrogen in stove top gas and the volume ratio of carbon monoxide, obtain being rich in the reducing gases of hydrogen.
(2) air inlet of carbon dioxide de removal apparatus respectively with the shaft furnace of dust arrester, Water gas shift/WGS device and gas-based shaft kilnTop gas outlet is connected, carbon dioxide de removal apparatus and be suitable for the reducing gases that removes Part II State of Blast Furnace top gas, is rich in hydrogenWith the carbon dioxide of the 0-100 volume % in the mist of vertical furnace top gas, obtain pretreatment reducing gases.
Thus, Part II State of Blast Furnace top gas and Part I State of Blast Furnace top gas and vertical furnace top gas three parts through reformingGas removes the carbon dioxide of 0-100 volume % altogether at carbon dioxide de removal apparatus, obtain pretreatment reducing gases.
(3) carbon dioxide de removal apparatus is connected with pressurizer, gasification furnace successively, successively pretreatment reducing gases carry out pressurization placeReason and reformation, heating, to improve carbon monoxide content, obtain high temperature reduction gas, and high temperature reduction gas are passed into oxygen blast furnaceLower air inlet and the reducing gases import of gas-based shaft kiln.
According to a particular embodiment of the invention, Part I State of Blast Furnace top gas is anti-through Water gas shift/WGS in Water gas shift/WGS deviceShould (CO+H2O＝CO2+H2), can regulate and make H in State of Blast Furnace top gas2/ CO is within the scope of 1～2:1, then with secondState of Blast Furnace top gas and the vertical furnace top gas of dividing are mixed together in carbon dioxide de removal apparatus, and optionally do not remove,Remove CO partly or completely2, make effective reducing gas component content higher than 90 volume %, then enter in pressurizer through addingAfter pressure, directly enter in gas-based shaft kiln from reducing gases import, reducting pellet ore deposit produces sponge iron. According to specific embodiment of the inventionExample, the temperature of the high temperature reduction gas after gasification furnace reformation and heating is 900-1200 degree Celsius. Can effectively use thusProduce sponge iron in gas-based shaft kiln.
Inventor's discovery, the coal gas amount producing in oxygen blast furnace ubiquity cupola well is few, to the heating efficiency of upper blast furnace furnace chargeDeficiency, causes upper blast furnace reducing power variation, smelts iron inefficient defect. For this reason, oxygen blast furnace of the present invention and gas baseOxygen blast furnace and gas-based shaft kiln are carried out combination by shaft furnace Joint Production system, first, by Water gas shift/WGS device by FirstPoint State of Blast Furnace top gas is reformed, and regulates and makes H in State of Blast Furnace top gas2With CO ratio, obtain being rich in the reducing gases of hydrogen. ItsInferior, introduce gasification furnace, and by the State of Blast Furnace top gas of Part I and State of Blast Furnace top gas and the shaft furnace of Part II after reformingTop gas is reformed together and is heated in gasification furnace. Particularly, by the State of Blast Furnace top gas of Part I and oxygen and coal dustTogether pass in gasification furnace, in gasification furnace, react as 2C+O2＝2CO、CO2+ C=2CO, the oxidation generating thusThe right State of Blast Furnace top gas of carbon is reformed, and has improved its reducing power, State of Blast Furnace top gas is heated simultaneously, improvesIts temperature, through reformation and heating after the temperature of high temperature reduction gas can reach 900-1200 degree Celsius. And then can be straightConnect the lower air inlet into oxygen blast furnace, and then the State of Blast Furnace top gas circulation after this reformation and heating is returned in oxygen blast furnace.Thus can be for oxygen blast furnace provides abundant reducing gas, the indirect reducing degree in upper blast furnace region is increased greatly, withTime reduce bottom house region direct-reduction, reduce the hear rate of cupola well high-temperature region.
In addition, the high temperature reduction gas obtaining after gasification furnace reformation and heating can directly pass in gas-based shaft kiln. Without volumeHeater is provided outward, therefore directly utilizes gasification furnace heating, higher compared with Thermal Efficiency of Pipe Heaters, and make gas-based shaft kiln alsoFormer technique has reduced a set of tubular heater device, and then has reduced equipment cost.
According to a particular embodiment of the invention, State of Blast Furnace top gas and vertical furnace top gas are carried out returning to oxygen after a series of processingBlast furnace. Can make the State of Blast Furnace top gas of a large amount of stoves more than needed of oxygen blast furnace output, in State of Blast Furnace top gas more than needed, not contain CH4, enterAnd can avoid State of Blast Furnace top gas for gas-based shaft kiln time, there is residual CH4The cracking of gas-based shaft kiln high temperature section produce C and byGradually stop up the problem of reducing gases nozzle.
According to the ingenious gasification furnace that used in the oxygen blast furnace of concrete example of the present invention and gas-based shaft kiln Joint Production system, fromAnd effectively solved the problem that State of Blast Furnace top gas reducing power is weak, temperature is low, and then effectively increase oxygen blast furnace systemGas making ability, has avoided circulating gas quantity not sufficient.
According to a particular embodiment of the invention, by logical the above-mentioned high temperature reduction gas obtaining after reforming and heating in gasification furnaceWhen entering the lower air inlet of oxygen blast furnace, in air inlet, blast 100～400Nm downwards3/ tHM normal temperature oxygen and winding-up150-300kg/tHM coal dust, preferably blasts 100～250Nm3/ tHM normal temperature oxygen and winding-up 200kg/tHM coal dust. RootAccording to specific embodiments of the invention, the intake of fine coal is higher than the intake of common oxygen blast furnace fine coal, thus, and the height passing intoTemperature reducing gases can promote coal dust firing, reduces air port convolution domain tyeory ignition temperature simultaneously.
According to a particular embodiment of the invention, oxygen blast furnace 10 also has enterprising air port 13, and it is high that enterprising air port 13 is positioned at oxygenOn the sidewall of stove 10 and higher than the furnace bosh of oxygen blast furnace. According to concrete example of the present invention, oxygen blast furnace is combined with gas-based shaft kilnProduction system further comprises: the gas outlet of gasification furnace 70 is connected with enterprising air port 13, and then can be by high temperature reduction gasA part passes into enterprising air port 13, to utilize high temperature reduction gas to carry out preheating and reduction to the top furnace charge in oxygen blast furnace.
Thus, the high temperature reduction gas obtaining by reformation in gasification furnace with after heating by said system is from enterprising air port and air intakeMouth passes in oxygen blast furnace. First, can promote coal dust firing from being positioned at the high temperature reduction gas that the lower air inlet of cupola well passes into,Reduce air port convolution domain tyeory ignition temperature simultaneously; Secondly, passable from being positioned at the thermal reduction gas that the enterprising air port of shaft passes intoTo upper blast furnace charge preheating, improve oxygen blast furnace internal heat and distribute. Oxygen blast furnace replaces traditional blast-furnace hot-air with pure oxygen,Got rid of the N2 that accounts for 79% volume in air, bosh place coal gas amount is compared traditional blast furnace and is significantly reduced, and has therefore reduced furnace charge saturatingGas requirement, significantly improves together with gas reduction gesture in oxygen blast furnace, can make rate of driving and production efficiency significantly improve.
The ingenious utilization gasification furnace of the oxygen blast furnace of the above embodiment of the present invention and gas-based shaft kiln Joint Production system, first, utilizesGasification furnace, as the gas making center (2C+O2=2CO) of whole system, can effectively be avoided oxygen blast furnace and gas-based shaft kiln reduction toleranceNot enough situation; Secondly, gasification furnace can be by the CO in gas2Be converted into CO, with traditional CO2Remove device and match,Can make system operation more flexible, reduce CO2The cost removing; Finally, in gasification furnace coal combustion heat release directly to passing intoTop gas heats, at the thermal efficiency, prevent from analysing the aspects such as carbon blocking pipe, operating pressure and be all greatly better than traditional utilizationThe mode of tubular heater heating gas.
Thus, by adopt the oxygen blast furnace of the above embodiment of the present invention and gas-based shaft kiln Joint Production system can be effectively byIron and steel is produced short flow process and is combined with long flow process, more can effectively solve the problem of oxygen blast furnace top gas internal circulating load deficiency,Simultaneously for gas-based shaft kiln provides sufficient source of the gas.
(4) carbon dioxide de removal apparatus is connected with the cold gas import that is positioned at gas-based shaft kiln bottom, and is suitable for pretreatment to reduceGas passes into from the bottom of gas-based shaft kiln. Thus a part of pretreatment reducing gases is entered to gas base by gas-based shaft kiln bottom nozzleShaft furnace, and then in uphill process, complete the carburizing of gas-based shaft kiln cooling section pelletizing, absorb hot sponge iron sensible heat, reach enhancingThe effects such as the pelletizing reduction effect in reduction shaft furnace section centre, the comprehensive energy consumption of reduction gas-based shaft kiln.
According to a further aspect in the invention, the invention allows for a kind of oxygen blast furnace and gas-based shaft kiln combine production method.
Comprise according to the oxygen blast furnace of the embodiment of the present invention and gas-based shaft kiln combine production method:
Utilize oxygen blast furnace to smelt iron, to obtain molten iron, and produce stock gas and slag;
Utilize gas-based shaft kiln to smelt iron, to obtain molten iron, and produce slag and vertical furnace top gas;
State of Blast Furnace top gas is carried out to dust removal process, and the State of Blast Furnace top gas after dust removal process is divided into two parts;
Utilize Water gas shift/WGS device to reform to Part I State of Blast Furnace top gas, to improve hydrogen content, be rich inThe reducing gases of hydrogen;
Part II State of Blast Furnace top gas, the reducing gases that is rich in hydrogen and vertical furnace top gas are mixed, obtain mist,And remove the carbon dioxide of the 0-100 volume % in mist, obtain pretreatment reducing gases;
Pretreatment reducing gases is carried out to pressurized treatments; And
Utilize gasification furnace that the pretreatment reducing gases after pressurized treatments is reformed and heated, contain to improve carbon monoxideAmount, obtains high temperature reduction gas, and high temperature reduction gas is passed into the reducing gases import of lower air inlet and the gas-based shaft kiln of oxygen blast furnace.
By adopting oxygen blast furnace and gas-based shaft kiln Joint Production system, particularly, by the height producing after ironmaking in oxygen blast furnaceStove top gas carries out being divided into two parts after dust removal process in dust arrester again, and Part I State of Blast Furnace top gas fills in Water gas shift/WGSIn putting, reform, to improve hydrogen content, obtain being rich in the reducing gases of hydrogen; Part II State of Blast Furnace top gas and water coalThe reducing gases that is rich in hydrogen and the vertical furnace top gas obtaining of reforming in gas converting means mixed, and at carbon dioxideRemove the carbon dioxide that removes 0-100 volume % in device, obtain pretreatment reducing gases; Pretreatment reducing gases through pressurization after at gasChange stove and reform and heat, to improve carbon monoxide content, obtain high temperature reduction gas, and pass into respectively oxygen blast furnaceThe reducing gases import of lower air inlet and gas-based shaft kiln.
Oxygen blast furnace according to a particular embodiment of the invention and gas-based shaft kiln combine production method are by gas-based shaft kiln and oxygen blast furnaceJoint Production, produces short flow process by iron and steel and combines with long flow process, has eliminated the long flow process high energy consumption of part, high CO2DischargeDrawback, the DRI simultaneously producing is the irreplaceable high-quality iron material of production high-quality steel. In addition, more can be effectivelySolve the problem of oxygen blast furnace top gas internal circulating load deficiency, simultaneously for gas-based shaft kiln provides sufficient source of the gas.
Describe oxygen blast furnace and the gas-based shaft kiln Joint Production side of the specific embodiment of the invention in detail below with reference to accompanying drawing 3 and Fig. 4Method.
According to a particular embodiment of the invention, utilize oxygen blast furnace to smelt iron, to obtain molten iron, and produce stock gasAnd slag; Utilize gas-based shaft kiln to smelt iron, to obtain sponge iron, and produce vertical furnace top gas.
According to a particular embodiment of the invention, further State of Blast Furnace top gas is carried out to dust removal process, and will be through dust removal processAfter State of Blast Furnace top gas be divided into two parts.
Respectively two part State of Blast Furnace top gas are processed below, particularly:
(1) utilize Water gas shift/WGS device to reform to Part I State of Blast Furnace top gas, to improve hydrogen content, obtainBe rich in the reducing gases of hydrogen.
Thus, Part I State of Blast Furnace top gas first-selection is reformed in Water gas shift/WGS device, to regulate Part I highHydrogen in stove top gas and the volume ratio of carbon monoxide, obtain being rich in the reducing gases of hydrogen.
(2) Part II State of Blast Furnace top gas, the reducing gases that is rich in hydrogen and vertical furnace top gas are mixed, obtain gaseous mixtureBody, and remove the carbon dioxide of the 0-100 volume % in mist, obtain pretreatment reducing gases.
Thus, Part II State of Blast Furnace top gas and Part I State of Blast Furnace top gas and vertical furnace top gas three parts through reformingGas removes the carbon dioxide of 0-100 volume % altogether at carbon dioxide de removal apparatus, obtain pretreatment reducing gases.
(3) pretreatment reducing gases is carried out to pressurized treatments; And utilize gasification furnace to the pretreatment reduction after pressurized treatmentsGas is reformed and is heated, to improve carbon monoxide content, obtains high temperature reduction gas, and high temperature reduction gas is passed into oxygenThe lower air inlet of blast furnace and the reducing gases import of gas-based shaft kiln.
According to a particular embodiment of the invention, Part I State of Blast Furnace top gas is anti-through Water gas shift/WGS in Water gas shift/WGS deviceShould (CO+H2O＝CO2+H2), can regulate and make H in State of Blast Furnace top gas2/ CO is within the scope of 1～2:1, then with secondState of Blast Furnace top gas and the vertical furnace top gas of dividing are mixed together in carbon dioxide de removal apparatus, and optionally do not remove,Remove CO partly or completely2, make effective reducing gas component content higher than 90 volume %, then enter in pressurizer through addingAfter pressure, directly enter in gas-based shaft kiln from reducing gases import, reducting pellet ore deposit produces sponge iron. According to specific embodiment of the inventionExample, the temperature of the high temperature reduction gas after gasification furnace reformation and heating is 900-1200 degree Celsius. Can effectively use thusProduce sponge iron in gas-based shaft kiln.
Inventor's discovery, the coal gas amount producing in oxygen blast furnace ubiquity cupola well is few, to the heating efficiency of upper blast furnace furnace chargeDeficiency, causes upper blast furnace reducing power variation, smelts iron inefficient defect. For this reason, oxygen blast furnace of the present invention and gas baseOxygen blast furnace and gas-based shaft kiln are carried out combination by shaft furnace combine production method, first, by Water gas shift/WGS device by FirstPoint State of Blast Furnace top gas is reformed, and regulates and makes H in State of Blast Furnace top gas2With CO ratio, obtain being rich in the reducing gases of hydrogen. ItsInferior, introduce gasification furnace, and by the State of Blast Furnace top gas of Part I and State of Blast Furnace top gas and the shaft furnace of Part II after reformingTop gas is reformed together and is heated in gasification furnace. Particularly, by the State of Blast Furnace top gas of Part I and oxygen and coal dustTogether pass in gasification furnace, in gasification furnace, react as 2C+O2＝2CO、CO2+ C=2CO, the oxidation generating thusThe right State of Blast Furnace top gas of carbon is reformed, and has improved its reducing power, State of Blast Furnace top gas is heated simultaneously, improvesIts temperature, through reformation and heating after the temperature of high temperature reduction gas can reach 900-1200 degree Celsius. And then can be straightConnect the lower air inlet into oxygen blast furnace, and then the State of Blast Furnace top gas circulation after this reformation and heating is returned in oxygen blast furnace.Thus can be for oxygen blast furnace provides abundant reducing gas, the indirect reducing degree in upper blast furnace region is increased greatly, withTime reduce bottom house region direct-reduction, reduce the hear rate of cupola well high-temperature region.
In addition, the high temperature reduction gas obtaining after gasification furnace reformation and heating can directly pass in gas-based shaft kiln. Without volumeHeater is provided outward, therefore directly utilizes gasification furnace heating, higher compared with Thermal Efficiency of Pipe Heaters, and make gas-based shaft kiln alsoFormer technique has reduced a set of tubular heater device, and then has reduced equipment cost.
According to a particular embodiment of the invention, State of Blast Furnace top gas and vertical furnace top gas are carried out returning to oxygen after a series of processingBlast furnace. Can make the State of Blast Furnace top gas of a large amount of stoves more than needed of oxygen blast furnace output, in State of Blast Furnace top gas more than needed, not contain CH4, enterAnd can avoid State of Blast Furnace top gas for gas-based shaft kiln time, there is residual CH4The cracking of gas-based shaft kiln high temperature section produce C and byGradually stop up the problem of reducing gases nozzle.
According to the ingenious gasification furnace that used in the oxygen blast furnace of concrete example of the present invention and gas-based shaft kiln combine production method, fromAnd effectively solved the problem that State of Blast Furnace top gas reducing power is weak, temperature is low, and then effectively increase oxygen blast furnace systemGas making ability, has avoided circulating gas quantity not sufficient.
According to a particular embodiment of the invention, by logical the above-mentioned high temperature reduction gas obtaining after reforming and heating in gasification furnaceWhen entering the lower air inlet of oxygen blast furnace, in air inlet, blast 100～400Nm downwards3/ tHM normal temperature oxygen and winding-up150-300kg/tHM coal dust, preferably blasts 100～250Nm3/ tHM normal temperature oxygen and winding-up 200kg/tHM coal dust. RootAccording to specific embodiments of the invention, the intake of fine coal is higher than the intake of common oxygen blast furnace fine coal, thus, and the height passing intoTemperature reducing gases can promote coal dust firing, reduces air port convolution domain tyeory ignition temperature simultaneously.
According to a particular embodiment of the invention, oxygen blast furnace also has enterprising air port, and enterprising air port is positioned at the sidewall of oxygen blast furnaceUpper and higher than the furnace bosh of oxygen blast furnace. According to concrete example of the present invention, oxygen blast furnace and gas-based shaft kiln combine production method enterOne step comprises: the gas outlet of gasification furnace is connected with enterprising air port, and then a part for high temperature reduction gas can be passed into upper air inletMouthful, to utilize high temperature reduction gas to carry out preheating and reduction to the top furnace charge in oxygen blast furnace.
Thus, the high temperature reduction gas obtaining by reformation in gasification furnace with after heating by said system is from enterprising air port and air intakeMouth passes in oxygen blast furnace. First, can promote coal dust firing from being positioned at the high temperature reduction gas that the lower air inlet of cupola well passes into,Reduce air port convolution domain tyeory ignition temperature simultaneously; Secondly, passable from being positioned at the thermal reduction gas that the enterprising air port of shaft passes intoTo upper blast furnace charge preheating, improve oxygen blast furnace internal heat and distribute. Oxygen blast furnace replaces traditional blast-furnace hot-air with pure oxygen,Got rid of the N2 that accounts for 79% volume in air, bosh place coal gas amount is compared traditional blast furnace and is significantly reduced, and has therefore reduced furnace charge saturatingGas requirement, significantly improves together with gas reduction gesture in oxygen blast furnace, can make rate of driving and production efficiency significantly improve.
The ingenious utilization gasification furnace of the oxygen blast furnace of the above embodiment of the present invention and gas-based shaft kiln combine production method, first, utilizesGasification furnace, as the gas making center (2C+O2=2CO) of whole system, can effectively be avoided oxygen blast furnace and gas-based shaft kiln reduction toleranceNot enough situation; Secondly, gasification furnace can be by the CO in gas2Be converted into CO, with traditional CO2Remove device and match,Can make system operation more flexible, reduce CO2The cost removing; Finally, in gasification furnace coal combustion heat release directly to passing intoTop gas heats, at the thermal efficiency, prevent from analysing the aspects such as carbon blocking pipe, operating pressure and be all greatly better than traditional utilizationThe mode of tubular heater heating gas.
Thus, by adopt the oxygen blast furnace of the above embodiment of the present invention and gas-based shaft kiln combine production method can be effectively byIron and steel is produced short flow process and is combined with long flow process, more can effectively solve the problem of oxygen blast furnace top gas internal circulating load deficiency,Simultaneously for gas-based shaft kiln provides sufficient source of the gas.
(4) pretreatment reducing gases is passed into from the cold gas import that is positioned at gas-based shaft kiln bottom.
Thus a part of pretreatment reducing gases is entered to gas-based shaft kiln by gas-based shaft kiln bottom nozzle, and then at uphill processIn complete the carburizing of gas-based shaft kiln cooling section pelletizing, absorb hot sponge iron sensible heat, reach and strengthen reduction shaft furnace section centreThe effects such as pelletizing reduction effect, the comprehensive energy consumption of reduction gas-based shaft kiln.
Also tool at least of oxygen blast furnace according to the above embodiment of the present invention and gas-based shaft kiln Joint Production system and combine production methodThere is one of following advantages:
1, gas-based shaft kiln and oxygen blast furnace Joint Production, iron and steel is produced short flow process and is combined with long flow process, has eliminated part longFlow process high energy consumption, high CO2The drawback of discharge, the DRI simultaneously producing is that the irreplaceable high-quality iron of production high-quality steel is formerMaterial.
2, in system, introduce gasification furnace, gasification furnace can solve high CO content heated by gas problem, increases oxygen blast furnace simultaneouslySystem gas making ability, avoids circulating gas quantity not sufficient.
3, utilize gasification furnace to provide heating gas for gas-based shaft kiln, cancelled the tubular heater in traditional gas-based shaft kiln technique, noOnly improve heated by gas efficiency, and avoided CO in coal gas in tubular heater, to analyse carbon reaction blocking pipeProblem.
4, in system, removed part CO2Coal gas, enter shaft furnace by the cold gas import of gas-based shaft kiln bottom, have as followsEffect: improve shaft furnace cooling section pelletizing carburizing amount; Absorb hot sponge iron sensible heat, reduce shaft furnace comprehensive energy consumption; Strengthen shaft furnaceNear pelletizing reduction effect reduction section center.
5, oxygen blast furnace shaft and cupola well respectively arrange an exhaust outlet, two arrange by this through gasification furnace thermal reduction gas after treatmentAir port enters blast furnace. Cupola well place (lower air inlet), thermal reduction gas can promote coal dust firing, reduces air port simultaneously and returnsRevolve domain tyeory ignition temperature; Shaft place (enterprising air port), thermal reduction gas can, to upper blast furnace charge preheating, improveOxygen blast furnace internal heat distributes.
Embodiment 1
With reference to figure 2 and 4, being specially of oxygen blast furnace and gas-based shaft kiln Joint Production system and method:
1) oxygen blast furnace 10 stock gases gas after dust arrester 30 dust removal process is divided into two parts. Part I gas entersWater gas shift/WGS device 40 produces H2, then enter CO2Remove device 50, Part II gas directly enters CO2Remove device 50,Two parts coal gas removes part CO after mixing with gas-based shaft kiln stock gas2. After this, coal gas is divided into two parts again, oneDivide and enter gas-based shaft kiln 20 by gas-based shaft kiln bottom nozzle (cold gas import), remainder is after pressurizer 60 pressurizationsEnter gasification furnace 70 and together react with oxygen and coal dust, obtain H2The high-temperature reductibility gas of/CO=1～2:1. This gas partBlast in oxygen blast furnace 10 from enterprising air port and the air inlet of oxygen blast furnace, another part passes into the reducing gases of gas-based shaft kiln 20Import, reduction-oxidation pelletizing production sponge iron.
2) under oxygen blast furnace, exhaust outlet blasts normal temperature oxygen (oxygen purity >=90%) and coal injection, and two rows air port is equalBlast thermal cycle coal gas.
3) gasification furnace blasts normal temperature oxygen (oxygen purity >=90%) and coal injection.
4) shaft furnace stock gas passes into CO2Remove device, mix with the coal gas from blast furnace, remove part CO2。
Calculate 1000m through theory3Oxygen blast furnace production and technical indication is as follows:
Oxygen blast furnace oxygen expenditure amount (90% purity): 245Nm3/tHM
Oxygen blast furnace coal ratio: 200kg/tHM
Oxygen blast furnace coke ratio: 205kg/tHM
Furnace top coal quantity: 1381Nm3/tHM
Stock gas composition: CO:48.8%, CO2：36.6％，H2：8.2％，H2O：2.6％，N2：3.8％Oxygen blast furnace output: 4200tHM/d
Gasification furnace oxygen expenditure amount (90% purity): 124Nm3/tHM
Gasification furnace coal dust consumption: 180kg/tHM
Circulating gas composition: CO:44.5%, H2：49.4％，N2：6.1％
Circulating gas temperature: 900 DEG C
Upper exhaust outlet circulating gas amount: 358Nm3/tHM
Lower exhaust outlet circulating gas amount: 400Nm3/tHM
Gas-based shaft kiln output: 2700tDRI/d
Embodiment 2
Substantially the same manner as Example 1, difference is:
Calculate 3000m through theory3Oxygen blast furnace production and technical indication is as follows:
Oxygen blast furnace oxygen expenditure amount (90% purity): 245Nm3/tHM
Oxygen blast furnace coal ratio: 200kg/tHM
Oxygen blast furnace coke ratio: 178kg/tHM
Furnace top coal quantity: 1357Nm3/tHM
Stock gas composition: CO:48.4%, CO2：36.9％，H2：8.3％，H2O：2.6％，N2：3.8％
Oxygen blast furnace output: 12600tHM/d
Gasification furnace oxygen expenditure amount (90% purity): 140Nm3/tHM
Gasification furnace coal dust consumption: 200kg/tHM
Circulating gas composition: CO:44.8%, H2：49.4％，N2：5.8％
Circulating gas temperature: 1100 DEG C
Upper exhaust outlet circulating gas amount: 382Nm3/tHM
Lower exhaust outlet circulating gas amount: 400Nm3/tHM
Gas-based shaft kiln output: 8000tDRI/d
Embodiment 3
Substantially the same manner as Example 1, difference is:
Calculate 5000m through theory3Oxygen blast furnace production and technical indication is as follows:
Oxygen blast furnace oxygen expenditure amount (95% purity): 225Nm3/tHM
Oxygen blast furnace coal ratio: 200kg/tHM
Oxygen blast furnace coke ratio: 191kg/tHM
Furnace top coal quantity: 1368Nm3/tHM
Stock gas composition: CO:49.8%, CO2：37.5％，H2：8.6％，H2O：2.6％，N2：1.5％
Oxygen blast furnace output: 21000tHM/d
Gasification furnace oxygen expenditure amount (95% purity): 121Nm3/tHM
Gasification furnace coal dust consumption: 180kg/tHM
Circulating gas composition: CO:46.8%, H2：50.0％，N2：3.2％
Circulating gas temperature: 900 DEG C
Upper exhaust outlet circulating gas amount: 382Nm3/tHM
Lower exhaust outlet circulating gas amount: 400Nm3/tHM
Gas-based shaft kiln output: 12700tDRI/d
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width "," thickness ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ",Orientation or position relationship that " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferentially " etc. indicate are based on shown in the drawingsOrientation or position relationship, be only the present invention for convenience of description and simplified characterization, instead of instruction or hint indication device orElement must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance orThe implicit quantity that indicates indicated technical characterictic. Thus, the feature that is limited with " first ", " second " can be expressed or be hiddenComprise one or more these features containing ground. In description of the invention, the implication of " multiple " is two or more,Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the arts such as term " installation ", " being connected ", " connection ", " fixing "Language should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be machineryConnecting, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be two unitsThe interaction relationship of the connection of part inside or two elements. For the ordinary skill in the art, can be according to toolBody situation is understood above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can beThe first and second features directly contact, or the first and second features are by intermediary mediate contact. And, the first spyLevy Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or onlyOnly represent that First Characteristic level height is higher than Second Characteristic. First Characteristic Second Characteristic " under ", " below " and " below "Can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than secondFeature.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " concrete example ",Or the description of " some examples " etc. means specific features, structure, material or the feature bag described in conjunction with this embodiment or exampleBe contained at least one embodiment of the present invention or example. In this manual, needn't pin to the schematic statement of above-mentioned termRight is identical embodiment or example. And specific features, structure, material or the feature of description can be at anyOr in multiple embodiment or example with suitable mode combination. In addition, not conflicting in the situation that, the technology of this areaPersonnel the feature of the different embodiment that describe in this description or example and different embodiment or example can be carried out combination andCombination.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary,Can not be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodimentChange, amendment, replacement and modification.
Claims (6)
1. oxygen blast furnace and a gas-based shaft kiln Joint Production system, is characterized in that, comprising:
Oxygen blast furnace, described oxygen blast furnace, for ironmaking, to obtain molten iron, and produces slag and State of Blast Furnace top gas;
Gas-based shaft kiln, described gas-based shaft kiln, for ironmaking, to obtain molten iron, and produces slag and vertical furnace top gas;
Dust arrester, described dust arrester is connected with the State of Blast Furnace top gas outlet of described oxygen blast furnace, and is suitable for described blast furnaceTop gas carries out dust removal process, and the State of Blast Furnace top gas after described dust removal process is divided into two parts;
Water gas shift/WGS device, described Water gas shift/WGS device is connected with described dust arrester, and is suitable for Part I blast furnaceTop gas is reformed, to improve hydrogen content, obtains being rich in the reducing gases of hydrogen;
Carbon dioxide de removal apparatus, the air inlet of described carbon dioxide de removal apparatus becomes with described dust arrester, water-gas respectivelyThe vertical furnace top gas outlet of changing device and described gas-based shaft kiln is connected, and is suitable for removing Part II State of Blast Furnace top gas, is rich in hydrogenThe carbon dioxide of the 0-100% volume in the mist of the reducing gases of gas and vertical furnace top gas, obtains pretreatment reducing gases;
Pressurizer, described pressurizer is connected with described carbon dioxide de removal apparatus, and is suitable for described pretreatment reducing gases to carry outPressurized treatments; And
Gasification furnace, the air inlet of described gasification furnace is connected with described pressurizer, and the gas outlet of described gasification furnace and described oxygen are highThe lower air inlet of stove and the reducing gases import of described gas-based shaft kiln are connected, and described gasification furnace is suitable for after described pressurized treatmentsPretreatment reducing gases reform and heat, to improve carbon monoxide content, obtain high temperature reduction gas, and by described heightTemperature reducing gases passes into the reducing gases import of lower air inlet and the described gas-based shaft kiln of described oxygen blast furnace.
2. oxygen blast furnace according to claim 1 and gas-based shaft kiln Joint Production system, is characterized in that described oxygenBlast furnace has enterprising air port, and described enterprising air port is positioned on the sidewall of described oxygen blast furnace and higher than the furnace bosh of described oxygen blast furnace,The gas outlet of described gasification furnace is connected with described enterprising air port, to utilize described high temperature reduction gas in described oxygen blast furnaceTop furnace charge carries out preheating and reduction.
3. oxygen blast furnace according to claim 1 and gas-based shaft kiln Joint Production system, is characterized in that described dioxyChange the cold gas import that carbon removes device and be positioned at described gas-based shaft kiln bottom and be connected, and be suitable for by described pretreatment reducing gases fromThe bottom of described gas-based shaft kiln passes into.
4. oxygen blast furnace and a gas-based shaft kiln combine production method, is characterized in that, comprising:
Utilize oxygen blast furnace to smelt iron, to obtain molten iron, and produce stock gas and slag;
Utilize gas-based shaft kiln to smelt iron, to obtain molten iron, and produce slag and vertical furnace top gas;
Described State of Blast Furnace top gas is carried out to dust removal process, and the State of Blast Furnace top gas after described dust removal process is divided into two parts;
Utilize Water gas shift/WGS device to reform to Part I State of Blast Furnace top gas, to improve hydrogen content, be rich inThe reducing gases of hydrogen;
By Part II State of Blast Furnace top gas, described in be rich in hydrogen reducing gases and described vertical furnace top gas mix, mixedClose gas, and remove the carbon dioxide of the 0-100% volume in described mist, obtain pretreatment reducing gases;
Described pretreatment reducing gases is carried out to pressurized treatments; And
Utilize gasification furnace that the pretreatment reducing gases after described pressurized treatments is reformed and heated, to improve an oxidationCarbon content, obtains high temperature reduction gas, and described high temperature reduction gas is passed into lower air inlet and the described gas base of described oxygen blast furnaceThe reducing gases import of shaft furnace.
5. oxygen blast furnace according to claim 4 and gas-based shaft kiln combine production method, is characterized in that, described oxygenBlast furnace has enterprising air port, and described enterprising air port is positioned on the sidewall of described oxygen blast furnace and higher than the furnace bosh of described oxygen blast furnace,Described oxygen blast furnace and gas-based shaft kiln combine production method further comprise:
A part for described high temperature reduction gas is passed into described enterprising air port, to utilize described high temperature reduction gas to described oxygenTop furnace charge in blast furnace carries out preheating and reduction.
6. oxygen blast furnace according to claim 4 and gas-based shaft kiln combine production method, is characterized in that, further bagDraw together: described pretreatment reducing gases is passed into from the cold gas import that is positioned at described gas-based shaft kiln bottom.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586451A (en) * | 2016-02-29 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln |
| CN105586453A (en) * | 2016-02-29 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln |
| CN105586455A (en) * | 2016-02-29 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln |
| CN105734190A (en) * | 2016-02-29 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas-based shaft kiln combination production system and combination production method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586451A (en) * | 2016-02-29 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln |
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| CN105586455A (en) * | 2016-02-29 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln |
| CN105734190A (en) * | 2016-02-29 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas-based shaft kiln combination production system and combination production method |
| CN105734190B (en) * | 2016-02-29 | 2018-09-07 | 神雾科技集团股份有限公司 | Oxygen blast furnace and gas-based shaft kiln Joint Production system and combine production method |
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